Galvanic battery



r 2 sheets -sneen 1. M. M. CLARK.

GALVANIG BATTERY.

No. 476,733. Patented June 7, 1892.

{I I i (No Model.) 2 Sheets-Sheet 2 M. M. CLARK.

GALVANIG BATTERY. No. 476,733. Patented June 7, 1892.

O O 0 d i 60 d W "'',r"''.'"'/" u Y u UNITED STATES 1 ATENT OFFICE.

MARTIN M. CLARK, OF CHICAGO, ILLINOIS.

GALVAN lC BATTERY.

SPECIFICATION forming part of Letters Patent No. 476,733, dated June 7,1892. Application filed December 26, 1888. Serial No. 294,602. (Nomodel.)

To aZZ whom it may concern:

Be it known that I, MARTIN M. CLARK, a citizen of the United States,residing at Chi cago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Carbon Batteries, (CaseNo. 5,) of which the following is a full, clear, eoncise, and exactdescription, reference being had to the accompanying drawings, forming apart of this specification.

My invention relates to galvanic batteries in which a zinc rod andcarbon plates are used as elements, these being placed in a solution ofsal-ammoniac.

My invention consists in the manner of mounting the carbon plates in thelead head or cover, in providing a lead binding-post upon the cover, ina wooden ring or collar for supporting the lead head upon the jar, andin the manner of supporting the zinc rod at the center of the carbonplates, as hereinafter described.

My invention is illustrated in the accompanying drawings, in which-Figure 1 is perspective view of aeell of battery embodying my invention.Fig. 2 is a vertical central sectional view through the lead head andthe carbon plates, showing the manner of suspending the plates and thezinc rod therefrom and the construction of the lead binding-post. Fig. 3is a detailed view show ing the manner of casting acarbon plate into thelead head. Fig. 4 is a plan of the wooden ring which is placed upon thetop of the glass jar and serves as a support for the lead head.

Like parts are indicated by similar letters of reference throughout thedifferent figures.

The glass jarais of the form now used with Leclanch batteries. Thewooden ring I; is fitted to the top of the jar and is provided with aseat Z) for the lead head 0, the head and the ring when in position, asshown in Fig. l, forming the cover of the jar.

I preferably use four carbon plates d. These carbon plates are slottedat the top and are cast into the lead head, preferably as shown in Figs.2 and 3. The zinc rod 6 is suspended from the center of the head, beinginsulated therefrom by the wooden bushing f. An elastic rubber collar 9,placed upon the zinc rod, serves as a stop to hold the rod suspended atany height required. The rubber piece It upon the lower portion of therod keeps the rod always separated from the carbon plates. The usualbinding-post i is provided in the upper end of the rod 6. Projectingfrom the upper surface of the lead head is provided the nip ple 7c. Thenut Z, placed thereon, is composed principally of lead, being hardened,however, by tin or bismuth, so as to prevent the thread of the screwfrom stripping when turned onto the projection 70. The binding post thusformed upon the lead head, which connects with the negative element,will not be sub ject to chemical action, as is the case when brass isused as a part of the binding-post, as has been usual heretofore.

The carbon plates are preferably annealed and perforated, as shown, inorder to make as much surface as possible. The wooden ring, as well asthe wooden bushing, I preferably boil in paraffine. The wood is thussaturated with paraftlne, in order that the insulating propertiesthereof may be improved. The paraiiine also prevents the wood fromwarping or being otherwise injuriously affected. The lead head, as wellas the wooden ring, I cover with japan as a protection against the saltswhich sometimes creep up to the lead. The ring, however, serves asadditional protection to the lead against the salt, since the lead isremoved from the edge of the glass jar by the width of the ring. Thesalt will not creep across the wood as readily as across glass. Hencethe lead head is better proteeted than would be the case if the leadhead were made large enough to rest upon the glass.

Having thus described my invention, I claim as new and desire to secureby Letters Patent-- 1. The combination, with the glass jar, of thewooden ring placed thereon, the lead head resting upon the wooden ring,the carbon ele ments supported by said lead head and being cast therein,the zinc element placed within the carbon elements and centrallysuspended from the lead head, a wooden paraffined bushing surroundingthe zinc element to insulate the same from the lead, the projection onthe lead head and the hardened lead nut placed on said projection,substantially as and for the purpose specified.

2. The combination, with the jar, of the lead head and the four carbonplates or elements cast therein, said head being provided with a centralopening and bushing placed in said opening, the zinc rod insertedthrough said bushing, an adjustable stop upon said zinc rod, which stoprests against thebushing, and a rubber piece upon the lower portion ofthe rod for separating the same from the carbon plates, and the Woodenring fitted to the upper edge of the jar upon which the lead head rests,substantially as and for the purpose specified.

3. The negative element composed of carbon plates, in combination with alead head, in which head the said carbon plates are cast, a leadbinding-post provided upon said head,

In witness whereof I hereunto subscribe my 2 5 name this 6th day ofDecember, A. D. 1888.

MARTIN M. CLARK. Witnesses:

GEORGE P. BARTON, CHAS. G. HAWLEY.

